#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
  int a = 0, b = 0;
  bool p = true;
  string S;
  cin>>S;
  for(int i=0;i<S.size();i++){
      if(S[i] == '/'){
          p = false;
      }
      else if(p){
          a *= 10;
          a += S[i]-'0';
      }
      else{
          b *= 10;
          b += S[i]-'0';
      }
  }
  cout<<fixed<<setprecision(4);cout<<a*1.0/b<<endl;
}